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The Sigma APO 150-600mm F5-6.3 DG OS HSM lens is a super-telephoto lens produced by Sigma Corporation. It is actually a range of two slightly different lenses based on a common design: the Sports and Contemporary. Both lenses feature similar specifications, but there are some notable differences.
The Sigma APO 150-500mm F5-6.3 DG OS HSM lens is a super-telephoto lens produced by Sigma Corporation. It contains three SLD (Special Low Dispersion) glass elements to provide correction for chromatic aberration. It is aimed toward advanced consumer level photographers, and is available in Nikon, Canon, Pentax and Sigma camera mounts.
The Sigma 50-500mm f / 4-6.3 EX DG HSM is a super-telephoto zoom lens produced by Sigma Corporation. It contains four SLD (Special Low Dispersion) glass elements to provide correction for chromatic aberration.
Rodenstock lenses for large-format cameras; L–R: Grandagon-N 115 mm f /6.8, Apo-Sironar-S 210 mm f /5.6, Grandagon-N 90 mm f /4.5 Rodenstock Photo Optics traces its origins to a mechanical workshop founded in 1877 by Josef Rodenstock and his brother Michael in Würzburg, Germany.
The first model, named 300-800mm F5.6 EX IF APO HSM (manufacturer code 594) was announced on 4 October 2002 at that year's Photokina and first delivered on 29 January 2003. The construction of the lens has 18 optical elements in 16 groups including 2 ELD (extra-low dispersion) elements.
The first Tessar appeared with a maximum aperture of f /6.3, but by 1917, the maximum aperture had been increased to f /4.5.In 1930, Ernst Wandersleb and Willy Merté from Zeiss developed Tessar lenses with apertures of f /3.5 and f /2.8.
The sequence of lens designations may differ in literature. See also full list of Nikon designations, Sigma designations, Tamron designations and Tokina designations.. Nikon AF-S/Sigma HSM/Tamron USD or PZD: The lens contains an integrated ultrasonic focus motor based on piezoelectricity, which enables quiet or low noise autofocus operation.
The EF 1200 mm f / 5.6 L USM is a super-telephoto prime lens that was made by Canon Inc. It uses an EF mount, and is compatible with the Canon EOS camera range. It has a focal length of 1200 mm and so on a digital body with a sensor size of 22.5 mm × 15 mm (called 1.6× crop), such as a Canon EOS 40D or 450D, it provides a 35 mm field of view equivalent to that of a 1920 mm lens.